/*
 * Iris is a World Generator for Minecraft Bukkit Servers
 * Copyright (c) 2021 Arcane Arts (Volmit Software)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

package com.volmit.iris.util.math;

/**
 * A 4 element point represented by single precision floating point x,y,z,w
 * coordinates.
 */
public class Point4f extends Tuple4f implements java.io.Serializable {


    // Compatible with 1.1
    static final long serialVersionUID = 4643134103185764459L;

    /**
     * Constructs and initializes a Point4f from the specified xyzw coordinates.
     *
     * @param x the x coordinate
     * @param y the y coordinate
     * @param z the z coordinate
     * @param w the w coordinate
     */
    public Point4f(float x, float y, float z, float w) {
        super(x, y, z, w);
    }


    /**
     * Constructs and initializes a Point4f from the array of length 4.
     *
     * @param p the array of length 4 containing xyzw in order
     */
    public Point4f(float[] p) {
        super(p);
    }


    /**
     * Constructs and initializes a Point4f from the specified Point4f.
     *
     * @param p1 the Point4f containing the initialization x y z w data
     */
    public Point4f(Point4f p1) {
        super(p1);
    }


    /**
     * Constructs and initializes a Point4f from the specified Point4d.
     *
     * @param p1 the Point4d containing the initialization x y z w data
     */
    public Point4f(Point4d p1) {
        super(p1);
    }


    /**
     * Constructs and initializes a Point4f from the specified Tuple4f.
     *
     * @param t1 the Tuple4f containing the initialization x y z w data
     */
    public Point4f(Tuple4f t1) {
        super(t1);
    }


    /**
     * Constructs and initializes a Point4f from the specified Tuple4d.
     *
     * @param t1 the Tuple4d containing the initialization x y z w data
     */
    public Point4f(Tuple4d t1) {
        super(t1);
    }


    /**
     * Constructs and initializes a Point4f from the specified Tuple3f.
     * The x,y,z components of this point are set to the corresponding
     * components of tuple t1.  The w component of this point
     * is set to 1.
     *
     * @param t1 the tuple to be copied
     * @since vecmath 1.2
     */
    public Point4f(Tuple3f t1) {
        super(t1.x, t1.y, t1.z, 1.0f);
    }


    /**
     * Constructs and initializes a Point4f to (0,0,0,0).
     */
    public Point4f() {
        super();
    }


    /**
     * Sets the x,y,z components of this point to the corresponding
     * components of tuple t1.  The w component of this point
     * is set to 1.
     *
     * @param t1 the tuple to be copied
     * @since vecmath 1.2
     */
    public final void set(Tuple3f t1) {
        this.x = t1.x;
        this.y = t1.y;
        this.z = t1.z;
        this.w = 1.0f;
    }


    /**
     * Computes the square of the distance between this point and point p1.
     *
     * @param p1 the other point
     * @return the square of distance between these two points as a float
     */
    public final float distanceSquared(Point4f p1) {
        float dx, dy, dz, dw;

        dx = this.x - p1.x;
        dy = this.y - p1.y;
        dz = this.z - p1.z;
        dw = this.w - p1.w;
        return (dx * dx + dy * dy + dz * dz + dw * dw);
    }


    /**
     * Computes the distance between this point and point p1.
     *
     * @param p1 the other point
     * @return the distance between the two points
     */
    public final float distance(Point4f p1) {
        float dx, dy, dz, dw;

        dx = this.x - p1.x;
        dy = this.y - p1.y;
        dz = this.z - p1.z;
        dw = this.w - p1.w;
        return (float) Math.sqrt(dx * dx + dy * dy + dz * dz + dw * dw);
    }


    /**
     * Computes the L-1 (Manhattan) distance between this point and
     * point p1.  The L-1 distance is equal to:
     * abs(x1-x2) + abs(y1-y2) + abs(z1-z2) + abs(w1-w2).
     *
     * @param p1 the other point
     * @return the L-1 distance
     */
    public final float distanceL1(Point4f p1) {
        return (Math.abs(this.x - p1.x) + Math.abs(this.y - p1.y) + Math.abs(this.z - p1.z) + Math.abs(this.w - p1.w));
    }


    /**
     * Computes the L-infinite distance between this point and
     * point p1.  The L-infinite distance is equal to
     * MAX[abs(x1-x2), abs(y1-y2), abs(z1-z2), abs(w1-w2)].
     *
     * @param p1 the other point
     * @return the L-infinite distance
     */
    public final float distanceLinf(Point4f p1) {
        float t1, t2;
        t1 = Math.max(Math.abs(this.x - p1.x), Math.abs(this.y - p1.y));
        t2 = Math.max(Math.abs(this.z - p1.z), Math.abs(this.w - p1.w));

        return (Math.max(t1, t2));

    }

    /**
     * Multiplies each of the x,y,z components of the Point4f parameter
     * by 1/w, places the projected values into this point, and places
     * a 1 as the w parameter of this point.
     *
     * @param p1 the source Point4f, which is not modified
     */
    public final void project(Point4f p1) {
        float oneOw;

        oneOw = 1 / p1.w;
        x = p1.x * oneOw;
        y = p1.y * oneOw;
        z = p1.z * oneOw;
        w = 1.0f;

    }

}
